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Provide an Appropriate Response

Question 153

Multiple Choice

Provide an appropriate response.
-An electronics store receives a shipment of eight boxes of calculators. Each box contains ten calculators. A quality control inspector chooses a box by putting eight identical slips of paper numbered 1 to 8 into a hat,
Mixing thoroughly and then picking a slip at random. He then chooses a calculator at random from the box
Selected using a similar method with ten slips of paper in a hat. He repeats the process until he obtains a
Sample of 5 calculators for quality control testing. Does this sampling plan result in a random sample? Simple
Random sample? Explain.


A) Yes; yes. The sample is random because all calculators have the same chance of being selected. It is a simple random sample because all samples of 5 calculators have the same chance of being selected.
B) No; yes. The sample is not random because not all calculators have the same chance of being selected. It is a simple random sample because all samples of 5 calculators have the same chance of being selected.
C) No; no. The sample is not random because not all calculators have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample containing 5
Calculators from the same box.
D) Yes; no. The sample is random because all calculators have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample containing 5 calculators
From the same box.

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